Sofa



FIG. 1 is a front view of the sofa;

FIG. 2 is a perspective view of the sofa;

FIG. 3 is a perspective view of the sofa showing all sections with footrests and headrests in extended positions;

FIG. 4 is a rear view of the sofa;

FIG. 5 is a rear view of the sofa showing the headrests in the extended position; and,

FIG. 6 is a front view of the sofa showing two sections spaced apart. 

CLAIM The ornamental design for a sofa, as shown and described. 